'Glee' star Dianna Agron and her 'I Am Number Four' co-star Alex Pettyfer have called it quits after less than one year together, according to an Us report that also claims Agron has just moved out of the home she'd been sharing with her leading man.

Less than a month ago, the actress' rep was vehemently denying rumors of an engagement.

British actor Pettyfer, 20, and Agron, 24, met on the set of their big-budget movie last year, and were first spotted getting cozy over the summer, when they were seen in Southern California shooting hoops, flirting affectionately and shopping for jewelry.

Yet it seems the sparks they shared onscreen in their much-hyped sci-fi thriller (produced by Steven Spielberg and Michael Bay) haven't translated into lasting love off camera.